Suppose the internet service provider XYZ, who has a network whose public IP addresses belong to the CIDR block 153.204.64.0/18. (i) How many

Suppose the internet service provider XYZ, who has a network whose public IP addresses
belong to the CIDR block 153.204.64.0/18.
(i) How many addresses does the block comprise?
(ii) What is the network mask of the XYZ network? [2]
(iii) Which of the following addresses could belong to a host on this network?
Briefly explain your answer.